Gage-cock.



j. R. SHAPLEY.

GAGE COOK.

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RAYMOND R'. SHAPLEY, OF HARRISBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALFTO BENJAMIN F. SNAVELY, 0F HARRISBURG, PENNSYLVANIA.

GAGE-COCK.

Specification of Letters Patent.

Patented July 30, 1912.

Application led October' 24, 1911. Serial No. 656,373.

T0 all whom t may concern Be it known that I, RAYMOND R. SHA1- LEY, acitizen of the United States, residing at Harrisburg, in the county ofDauphin and State of Pennsylvania, have invented a new and usefulGage-Cock, of which the following is a specification.

This invention relates to gage cocks and is more particularly animprovement upon the structure disclosed in Patent No. 950,351, issuedto me February 22, 1910.

In devices of this character heretofore provided with auxiliary valves,it has been impossible to grind the main valves without releasing thepressure from the boiler, and, when it has been found necessary to dressthe seats of the main valves, said valves have lirst been removed andthe seats reamed by means of a tool provided for that purpose. The litof each valve upon a seat prepared in this manner has not been asaccurate as desired and as is obtained by grinding a valve upon itsseat. Such grinding has been impossible heretofore, however, withoutunseating the auxiliary valve.

It is the obj ect of the present invention to provide a gage cock inwhich either or both of the valves can be ground upon their seatswithout releasing the pressure.

VvTith the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

ln said drawings: Figure 1 is a longitudinal section through the gagecock, the two valves being unseated. Fig. 2 is a view partly in sideelevation and partly' in section of the gage cock, the spacing stembeing removed and both valves being vshown upon their seats. Fig. 3 is asection on line A-B Fig. 1. Fig. 4L is a section on line C-D Fig. 1.Fig. 5 is a perspective view of the spacing stem. Fig. 6 is aperspective View of the main valve.

Referring to the figures by characters of reference 1 designates thecasing of the gage cock, the same being pro-vided with opposed seats 2and 3 for the main and auxiliary valves respectively. Both ends of thecasing are open, one end portion being exterior-ly screw threaded so asto engage the wall of a boiler, as indicated at 4;, while the other endof the casing is interiorly screw threaded as at 5, for engagement withthe threaded portion 6 of a valve stem 7. The inner end of the stem 7has an opening 7 therein to receive a stem 8 projecting from the taperedmain valve S of the cock and a central angular recess 9 is formed withinthe free end of the valve 8 and is adapted to receive an angular spacingstem 10. This stem 10 is arranged longitudinally in casing 1 and one endportion thereof is seated within an angular recess 11 formed in t-hecenter of an auxiliary valve 12. The auxiliary valve 12 is preferablyformed with longitudinal wings 13 whereby it is held properly centeredwithin the casing 1 when the valve is off its seat, steam being free tofiow past the valve by way of the spaces between the wings. It will benoted that the greatest diameter of the stem 10 is substantially equalto the internal diameter of the casing 1 between the seats 2 `and 3.Thus it will be seen that the stem 10, when placed in the casing,becomes centered so as to be readily seated within the recesses 9 and 1lwithout requiring any particular adjustment of the parts. As the stem isangular in cross sectional contour it will be apparent that it can thusbe centered within the casing without interfering with the passage offluid between the flat walls of the stem and the interior surface of thecasing.

A discharge nozzle 14 extends from the casing l at a point adjacent themain valve 8.

With the parts constructed and assembled as described, it will be seenthat by unscrewing the valve stem 7 so as to unseat the valve 8, steampressure will cause the auxiliary valve 12 to move against its seat,thus pre vent-ing the escape of pressure. After the auxiliary valve hasthus been seated, the stem 7 can be further rotated one or more timesafter which, by turning the stem back and forth the auxiliary valve canbe caused to grind upon its seat, t-hus removing sediment from the valveand its seat and causing the said valve to lit snugly on the seat. Thisgrinding of the auxiliary valve is of course permitted in View of thefact that after the auxiliary Valve becomes seated urther unscrewing ofthe stem 7 tends to partly Withdraw the stem from the spacing stem l0.

Should it be desired to grind the main Valve Without releasing thepressure, the Valve stem 7 is removed entirely from the casing 1 and thespacing stem l0 is then removed. By then reinserting the valve 8 intothe casing 1, said valve can be ground upon its seat in the usual mannerWithout unseating the auxiliary Valve l2.

Vhat is claimed is In a gage cock, the combination with a casing havingopposed tapered seats therein, and a threaded Valve stem screwed intothe casing and having an angular opening in the inner end thereof, of amain valve having a tapered end formed With an angular recess, anangular stem extending from and integral With the other end of the mainvalve and slidable into and adapted to frictionally engage the Walls ofthe recess in the threaded stem, an angular spacing stem seated at oneend Within the recess in the main valve and extending longitudinallyWithin the casing and past the opposed seats, and a tapered auxiliaryvalve having a recess for the reception of the other end of said spacingstem.

In testimony that I claim the foregoing as my own, I have hereto aiiixedmy signature in the presence of two Witnesses.

RAYMOND R. SHAPLEY.

vVitnessesn FRED IV. STUART, EUGENE SNYDER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

v Washington, D. C.

